Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine

Authors

LI Wensong, Dayan Company of China Energy Investment Corporation, Hulun Buir 021122, China
DANG Yakun, Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, ChinaFollow
ZHU Mingcheng, Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, China
GAO Ya, Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology, Xi'an 710077, China

Abstract

Anti-seepage membrane(HDPE geomembrane) is widely used in anti-seepage projects currently that mainly prevent pollution, leakage and diffusion, and its laying form was various. In an underground water cutoff curtain project of an open-pit coal mine in China, the anti-seepage membrane was laid vertically as the main body of the water cutoff curtain wall, and the largest concealed depth was about 50 m. The different groove sections was overlapping connected by using connection box technology. Through the grouting and backfilling process, the impermeability of the curtain wall was improved and the anti-seepage membrane was compacted. Finally, pumping test in the surrounding wells was used to verify the impermeability of the curtain wall. The results showed that the permeability coefficient of anti-seepage membrane curtain wall was just 8.6×10^-7 cm/s which met the design requirements. The anti-seepage membrane curtain wall has the advantages of high efficiency, low cost, and environmental protection. The successful application of the anti-seepage membrane in this project has significant reference for other similar projects.

Keywords

open-pit coal mine, water cutoff curtain, anti-seepage membrane, vertical concealed laying, overlapping connection, surrounding well test

DOI

10.3969/j.issn.1001-1986.2020.04.010

Recommended Citation

LI Wensong, DANG Yakun, ZHU Mingcheng, et al. (2020) "Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine," Coal Geology & Exploration: Vol. 48: Iss. 4, Article 11.
DOI: 10.3969/j.issn.1001-1986.2020.04.010
Available at: https://cge.researchcommons.org/journal/vol48/iss4/11

Reference

[1] 刘春雷. HDPE复合土工膜在防渗工程中的应用[J]. 价值工程,2013,30:93-94. LIU Chunlei. The application of HDPE composite geomembrane in seepage control engineering[J]. Value Engineering,2013,30:93-94.

[2] 王玉丰. 土工合成材料在露天煤矿的应用[J]. 露天采矿技术,2012(6):6-7. WANG Yufeng. Application of geosynthetics in open-pit coal mines[J]. Opencast Mining Technology,2012(6):6-7.

[3] 袁满洪. 水利基础施工中不同地质基础下的抗渗措施[J]. 技术与市场,2018,25(8):94-95. YUAN Manhong. Anti-seepage measures under different geological foundations in water conservancy foundation construction[J]. Technology and Market,2018,25(8):94-95.

[4] 潘绍财,李春雁. 垂直铺塑技术应用条件分析及质量控制要点[J]. 吉林水利,2007(7):39-40. PAN Shaocai,LI Chunyan. The application conditions analysis and quality control points of vertical plastic coating technology[J]. Jilin Water Resources,2007(7):39-40.

[5] 张德友. 浅谈防渗帷幕在堤防加固中的应用[J]. 治淮,2016(7):23-24. ZHANG Deyou. The application of anti-seepage curtain in dike reinforcement[J]. ZhiHuai,2016(7):23-24.

[6] 姚有朝,鲍忠伟. 垂直防渗帷幕在平原型卫生填埋场中的运用[J]. 环境工程,2008,26(3):29-32. YAO Youchao,BAO Zhongwei. Application of vertical cut-off curtain to sanitary landfill site in plain areas[J]. Environmental Engineering,2008,26(3):29-32.

[7] 张雁. 露天煤矿截渗减排新技术[J]. 露天采矿技术,2017,32(6):45-47. ZHANG Yan. New technology of cutting off seepage channel and reducing water drainage in open-pit coal mine[J]. Opencast Mining Technology,2017,32(6):45-47.

[8] 赵春虎,王强民,王皓,等. 东部草原区露天煤矿开采对地下水系统影响与帷幕保护分析[J]. 煤炭学报,2019,44(12):3685-3692. ZHAO Chunhu,WANG Qiangmin,WANG Hao,et al. Analysis of influence of open-pit coal mining on groundwater system and curtain wall protection in grassland area of northeastern China[J]. Journal of China Coal Society,2019,44(12):3685-3692.

[9] 张雁,黄选明,彭巍,等. 截水帷幕在露天煤矿截渗减排中的应用[J]. 煤炭学报,2020,45(5):1865-1873. ZHANG Yan,HUANG Xuanming,PENG Wei,et al. Application of water cutoff curtain in the seepage cutoff and drainage reduction of open-pit coal mine[J]. Journal of China Coal Society,2020,45(5):1865-1873.

[10] 晏自立,赵磊华,冯路明,等. 水工防渗复合土工膜施工技术及质量控制综述[J]. 人民长江,2018,49(增刊2):176-181. YAN Zili,ZHAO Leihua,FENG Luming,et al. Summary of construction technology and quality control of hydraulic anti-seepage composite geomembrane[J]. Yangtze River,2018,49(Sup.2):176-181.

[11] 庞红卫. 复合土工膜在人工湖防渗工程中的应用及施工技术探讨[J]. 居舍,2018(11):54. PANG Hongwei. Application of composite geomembrane in anti-seepage engineering of artificial lake and discussion on construction technology[J]. Residence,2018(11):54.

[12] 张立新,李勇,牛景涛,等. "垂直铺塑防渗技术"的拓展应用技术研究[C]//2015水利水电地基与基础工程:中国水利学会地基与基础工程专业委员会第13次全国学术研讨会论文集. 成都:中国水利水电出版社,2015:772-776. ZHANG Lixin,LI Yong,NIU Jingtao,et al. Research on the expanded application technology of "vertical plastic anti-seepage technology"[C]//2015 Water conservancy and hydropower foundation and foundation engineering:Proceedings of the 13th national academic symposium of foundation and foundation engineering professional committee of Chinese water conservancy society. Chengdu,Sichuan:China Water Resources Press,2015:772-776.

[13] 艾立新,林炜,徐孟军,等. 防渗地连墙在露天矿边坡治水工程中的应用[J]. 化工矿物与加工,2015(9):43-45. AI Lixin,LIN Wei,XU Mengjun,et al. Practice of impermeable wall in water control project for open pit slope[J]. Industrial Minerals & Processing,2015(9):43-45.

[14] 丁浩. HDPE膜防渗技术在路基施工中的应用探讨[J]. 建筑技术开发,2017,44(3):98-99. DING Hao. To investigate HDPE membrane impermeable subgrade construction technology[J]. Building Technology Development,2017,44(3):98-99.

[15] 杨勇. 浅析如何加强地连墙接缝处止水质量[J]. 绿色环保建材,2019(6):205-206. YANG Yong. Analysis on how to strengthen the quality of water stop at the joint of diaphragm wall[J]. Green Environmental Protection Building Materials,2019(6):205-206.

[16] 王海,黄选明,朱明诚,等. 基于高掺量粉煤灰防渗墙的露天矿水资源保护技术[J]. 煤炭学报,2020,45(3):1160-1169. WANG Hai,HUANG Xuanming,ZHU Mingcheng,et al. Water-preserved coal mining technology in open pit based on cutoff wall with high fly ash content[J]. Journal of China Coal Society,2020,45(3):1160-1169.